KR101966108B1 - Feeder for manufacturing pellets of materials containing more than 50% of paper powder - Google Patents

Abstract

The present invention relates to a main supply device for supplying a raw material to an extrusion molding device of a pellet molding device and, more specifically, to a supply device of a raw material for producing pellets containing more than 50% of paper powder in which gas generated by heating in a first mixing region of the extrusion molding machine is prevented from flowing back together with the raw material to improve the productivity, when the raw material containing a main material in a powder form having a very small apparent specific gravity and an additive is supplied to an extrusion molding machine of the pellet molding device.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a feeder for producing pellets containing 50% or more of paper powder,

The present invention relates to a main feeder for feeding a raw material to an extrusion molding machine of a pellet molding machine, and more particularly to a main feeder having a powdery main material having a very small apparent specific gravity and a raw material containing an additive, The present invention relates to a raw material feed device for pellet production, which comprises at least 50% of paper powder capable of improving the productivity by preventing the gas generated by heating in the first mixing region of the extruder from flowing back together with the raw material .

In general, pellets, which are a raw material of a synthetic resin such as plastic, are used for injection molding or extrusion molding of plastic, and injection-molded or extruded plastic resins are injection-molded into an injection mold in a molten state, It is used as interior and exterior materials for automobile interior materials, interior and exterior materials for electronic products, and toys.

The pellet is a solid material obtained by compression-molding the raw material under a high-pressure environment. The pellet of the synthetic resin as a raw material, that is, the main material, is usually subjected to a raw material mixing and feeding step, a melting and extruding step, And finally manufactured.

The pellet molding apparatus 10 is provided with a feeding device 100 for feeding and mixing raw materials to and from the extrusion molding machine 20, The raw material extruded in the cooling section, that is, the extruded raw material is cooled, and then the raw material cooled in the cutting device is extruded by the extruder 20, Whereby pellets based on synthetic resin are produced.

At this time, the pellet using the synthetic resin as a main material must be made small in size through the pulverizing process in order to smoothly melt and press the raw material including the waste synthetic resin or the synthetic resin in the extrusion molding machine 20.

On the other hand, when the main material of the pellet using the synthetic resin as a raw material is a powdery main material having a very small apparent specific gravity, moisture and gas contained in the raw material are produced in the melting and extrusion process using the extrusion molding machine 20, An air vent or the like is installed in the rear of the extrusion molding machine 20 to discharge moisture and gas.

For example, in Korean Patent No. 0541042, a ball valve is installed between a flame retardant powder storage hopper and a flame retardant sub hopper to prevent bridge phenomenon of the flame retardant powder, and a flame retardant powder is added to a single pipe connected to the bottom of the flame retardant feeder screw An air knocker is installed so as to prevent blocking phenomenon and a kneading zone is formed in two steps in order to prevent the pellet from being produced without melting the powder in the extruder screw, and the vent zone is formed in one step, and the conventional O-ring is removed, thereby providing an extruder facility for producing a flame retardant resin composition pellet.

However, in the conventional pellet forming apparatus using a raw material including powder-like main material, the raw material is flowed back to the main supply device by moisture and gas generated in the extrusion molding machine, and the main supply device is prevented from failing The operation of the main supply device is temporarily stopped or the feed rate of the raw material is lowered. As a result, the supply of the raw material is not smoothly performed, and the productivity of the pellet is lowered.

On the other hand, in recent years, it has been demanded to produce products by injection molding or extrusion molding of plastics including environmentally friendly raw materials for environmental friendliness. For the environment friendliness, paper, that is, .

At this time, pellets are also used to produce a molded article of synthetic resin containing the paper. In order to produce the paper-containing pellets, the paper is supplied in powder form so as to be melted with a synthetic resin, and the paper is supplied in powder form Since the apparent specific gravity of the paper powder is very small, there is a problem that the productivity is remarkably lowered due to the reverse flow more than the synthetic resin powder due to moisture and gas generated in the extrusion molding machine.

That is, since the paper powder has a very small specific gravity as compared with the synthetic resin powder and a large amount of water contained therein, the amount of the raw material flowing back to the main supply device due to moisture and gas generated in the extrusion molding machine is increased, As a result, the supply of the raw material is not smoothly performed, and the productivity is significantly lowered.

In order to solve the above problems, it has been attempted to reduce the content of paper, that is, to make pellets having a content of paper powder of 30% or less. However, in the conventional pellet milling machine, Pellets having poor productivity and low quality have been produced due to the same problems.

Korean Patent No. 1880614 Korean Patent No. 0541042

Disclosure of Invention Technical Problem [8] The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a pellet molding machine, which comprises a main raw material powder- The object of the present invention is to provide a raw material feed device for pellet production, which contains 50% or more of paper powder which can prevent the gas generated by heating in the region from flowing back together with the raw material and improve the productivity.

In order to realize the above-described object, the present invention provides a feeding device for feeding a raw material containing a main material in powder form and an additive to an extrusion molding machine of a pellet molding machine, The present invention provides a raw material feeding device for producing pellets containing at least 50% of paper powder.

The present invention relates to a feeding device for feeding a raw material containing a main material in powder form and an additive to an extrusion molding machine of a pellet molding machine, the feeding device comprising a feed hopper into which the raw material is fed from a feed pipe and a cylindrical feed A screw installed at an inner center of the supply hopper and the supply cylinder, a motor installed at an upper portion of the supply hopper to rotate the screw, a plug coupled to a lower portion of the supply cylinder, And a vent pipe provided between the supply cylinder and the main supply barrel. The raw material supply apparatus for pellet production according to claim 1,

Further, the vent pipe of the present invention is configured to include a mesh network coupled to one end located between the supply cylinder and the extrusion molding machine, wherein the mesh network is disposed at one side And the feeder is characterized in that the raw material is filled in the extruder before supplying the raw material to the extruder.

The supply hopper according to the present invention is characterized in that the supply hopper is formed in a range of a central angle of 58 to 62 degrees and a height of 550 mm or more and at least one air knocker installed on the outer circumference .

Further, the main supply barrel of the present invention may include a screw hole provided inside the extruder and having the other side of the compression screw of the extruder, and the diameter of the supply cylinder may be the same as the diameter of the screw hole of the main supply barrel And a height of 463 mm or more.

The raw material supplying device for producing pellets containing 50% or more of the paper powder according to the present invention as described above can supply raw materials containing a main raw material powder having a very small specific gravity and an additive to the extruder at a constant feed rate and smoothly It is possible to obtain the effect of improving the production amount of the pellets manufactured and to prevent the frequent failure of the supply device by the backflow material to reduce the maintenance cost.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of a pellet molding apparatus according to a preferred embodiment of the present invention.
2 is a partial side view showing a pellet molding apparatus according to a preferred embodiment of the present invention.
3 is a partial side view schematically showing an extrusion molding machine of a pellet molding apparatus according to a preferred embodiment of the present invention.
Figure 4 is a side view of a feeder according to a preferred embodiment of the present invention.
Figure 5 is a front view of a feeder according to a preferred embodiment of the present invention;
6 is an enlarged view of a portion "A"

The present invention relates to a feeding device 100 that serves as a main feeder for feeding a raw material to an extrusion molding machine 20 of a pellet forming apparatus 10. More specifically, the present invention relates to a feeding device 100 in which a powder- It is possible to prevent the gas generated by the heating in the first mixing region of the extrusion molding machine 20 from flowing back together with the raw material when the raw material contained therein is supplied to the extrusion molding machine 20 of the pellet molding apparatus 10, The present invention relates to a raw material feeder for producing pellets containing at least 50% of paper powder capable of improving productivity.

In order to achieve the above-described object, the present invention provides a method of manufacturing a pellet molding apparatus (10), comprising the steps of feeding a raw material containing a main raw material powder and an additive to an extrusion molding machine And a vent pipe (170) provided between the feeding device (100) and the extrusion molding machine (20) in the feeding device (100). A raw material supply device is presented.

The present invention relates to a supply device (100) for supplying a raw material containing a main material in powder form and an additive to an extrusion molding machine (20) of a pellet molding apparatus (10), characterized in that the raw material is supplied from a supply hopper A cylindrical supply cylinder 120 coupled to a lower portion of the supply hopper 110 and a screw 130 installed at an inner center of the supply hopper 110 and the supply cylinder 120, A motor 150 installed at an upper portion of the cylinder 150 and rotating the screw 130 and a plug 150 coupled to a lower portion of the supply cylinder 120; A main supply barrel 160 connected to the main supply part 22 of the main body 20; And a vent pipe (170) installed between the supply cylinder (120) and the main supply barrel (160). The present invention also provides a raw material feeding device for pellet production containing 50% or more of paper powder .

The vent pipe 170 of the present invention is configured to include a mesh net 172 coupled to one end located between the supply cylinder 120 and the extrusion molding machine 20, The mesh network 172 is formed such that one end of the mesh network 172 is located up to the center of the screw 130 of the supply device 100. The supply device 100 supplies the raw material to the extrusion molding machine 20 And the raw material is filled in the inside before doing so.

The feed hopper 110 of the present invention is formed such that the central angle θ is formed in a range of 58 to 62 ° and the height h is formed in a range of 550 mm or more, And an air knocker (112).

The main supply barrel 160 of the present invention includes a screw hole 162 formed in the inside of the main supply barrel 160 and provided with the other side of the compression screw 130 of the extrusion molding machine 20, 120 have a diameter equal to a width w of the screw hole 162 of the main supply barrel 160 and a height h of 463 mm or more.

Hereinafter, the present invention will be described in detail with reference to the drawings 1 to 6 showing embodiments of the present invention.

First, a raw material supplying apparatus 100 for producing pellets (hereinafter, referred to as 'supplying apparatus') in which the paper powder of the present invention contains 50% or more of the paper powder is inserted into a compression screw 130 and the raw material is supplied to the inside of the barrel provided between the speed reducer and the extrusion molding machine 20 and equipped with the compression screw 130 of the extrusion molding machine 20.

FIG. 2 is a side view of the speed reducer, the feeder 100 and the extruder 20 shown in FIG. 1. In general, a feeder 100 is provided between the reducer and the extruder 20, Additional side feeds can be installed if necessary. At this time, the feeding device shown in Fig. 2 is not a feeding device 100 of the present invention but a conventional feeding device.

In addition, the raw materials referred to in the present invention include powdery main material and additive, and the powdery main material has a very small apparent specific gravity, an average particle size of 30 μm, an apparent specific gravity of 0.25 to 0.35 kg / L , A water content ratio of 2 to 6%, a plastic resin, and an additive. When the paper powder is pressurized and heated in the mixing zone of the extrusion molding machine 20, a large amount of water vapor is generated, The plastic resin is made of polypropylene or the like, and the additive is composed of an internal lubricant and a suspending agent, and other gas such as carbon dioxide is generated in the mixed region of the extrusion molding machine 20 by the plastic resin and the additive. At this time, the additive is mixed with the main material in powder form to smoothly form the pellets.

Specifically, the paper powder is a purged glaze paper which is often used as a medicine, a fruit sealer, etc., and is formed into a powder through coarse pulverization and fine pulverization for smooth pellet formation, and then supplied through a feeding device 100 of the present invention do.

That is, the raw materials referred to in the present invention are used when the raw material supplied to the extrusion molding machine 20 is pressurized and heated in the mixing region, particularly when the main supply device 100 is installed (MAIN FEED) or a feed of the water in the first mixed region after the position where the auxiliary feeder is installed (SIDE FEEDER), particularly by the paper powder, There is a phenomenon that the powder (hereinafter, referred to as "powder-like main material") flows backward, and thus the supply of the raw material is not smoothly performed.

3, the extrusion molding machine 20 is provided with a position (MAIN FEED) in which a feeding device 100 for mainly feeding a raw material is installed, and a position (ATM VENT) for discharging gas containing water vapor generated as a result of pressurization and heating of the raw material in the mixed region, and a gas outlet portion for discharging the gas not removed from the air vent portion A vacuum vent (VAC. VENT) is formed which forcibly removes the residue using a vacuum.

Thus, even if the gas generated in the moving region before the mixing region flows backward in the powder form, especially in the case of the raw material having a small apparent specific gravity, the extrusion molding machine 20 also has the vent portion for discharging the gas generated in the mixing region. And the generated gas is mostly removed through the air vent portion and the vacuum vent portion. On the other hand, the raw material containing the powder-type main material used in the present invention has an apparent specific gravity So that it is backwashed together with the gas generated in the moving region before the mixing region, thereby causing a problem of supplying the raw material as described above.

That is, the supply device 100 of the present invention supplies powdery main material having a small apparent specific gravity and a raw material containing an additive to the extrusion molding machine 20 of the pellet molding apparatus 10, And a vent pipe (170) installed between the supply device (100) and the extrusion molding machine

In addition, the supply device 100 of the present invention uses the vent pipe 170 to discharge the gas flowing backward through the moving region before the mixing region to the outside to lower the backflow pressure, The raw material that has been backwashed by the raw material supplied in accordance with the present invention can be supplied to the extrusion molding machine 20, thereby realizing the effect of smooth supply of the raw material.

Specifically, the feeding device 100 for achieving the present invention includes a feeding hopper 110 into which a raw material containing a main material in powder form and an additive is fed from a feeding pipe, and a cylindrical A screw 130 installed at an inner center of the supply hopper 110 and the supply cylinder 120 and a screw 130 installed at an upper portion of the supply hopper 110 to rotate the screw 130. [ A plug 150 coupled to a lower portion of the supply cylinder 120 and a main supply connected to a main supply portion 22 of the extrusion molding machine 20, And a vent pipe 170 installed between the supply cylinder 120 and the main supply barrel 160.

The supply hopper 110 includes a pipe coupling hole (not shown) formed on an upper surface thereof and coupled to an end of the supply pipe so that the raw material can be input from a supply pipe, A plurality of the main material of the shape, and at least one or more additives may be supplied.

At this time, the supply pipe is connected to a storage tank in which a main material or an additive is stored through a quantitative supply device (not shown), so that the main material or additive is supplied to the supply hopper 110.

In addition, the supply hopper 110 is provided with at least one outer periphery and an air knocker 112 for uniformly distributing the supplied raw material to one side.

The feed cylinder 120 is formed in a cylindrical or multi-steel shape and is connected to the lower portion of the feed hopper 110 so that the raw material to be fed into the feed hopper 110 is mixed with the screw 130, So as to realize the effect of being moved downward.

The screw 130 is installed at an inner center of the supply hopper 110 and the supply cylinder 120 and is coupled to a lower portion of a rotating rod (not shown) of the motor 140, And the lower end of the feed cylinder 110 is formed to the end of the feed cylinder 120 so that the raw material in the form of powder and the additive introduced into the feed hopper 110 are fed from the feed hopper 110 to the feed cylinder 120 Lt; / RTI > to the end of the tube.

The motor 140 is installed on the upper part of the supply hopper 110 and a rotating rod penetrates through the center of the upper surface of the supply hopper 110 at the lower part to rotate the screw 130, By engaging with the upper portion of the screw 130 described above, the screw 130 is rotated by the operation of the motor 140 to mix and move the raw material.

The plug 150 has an upper portion coupled to the lower portion of the supply cylinder 120 and a lower portion coupled to an upper portion of the main supply barrel 160 to be described later in detail, And a vent pipe 170 is inserted into the insertion hole.

That is, the plug 150 allows the vent pipe 170 to be smoothly installed between the supply cylinder 120 and the main supply barrel 160, (Not illustrated) in which the supply of the raw material and the back flow coexist between the supply port and the outlet port of the vent pipe 170, Thereby realizing the effect of smooth supply of raw materials.

The upper portion of the main supply barrel 160 is coupled to the lower portion of the plug 150 and the lower portion of the main supply barrel 160 is connected to the main supply portion 22 of the extrusion molding machine 20, A screw hole 162 in which the other side of the screw 130 is installed is formed in a direction orthogonal to the screw 130 or the supply cylinder 120.

Although it is obvious that the screw holes 162 are formed to correspond to the shape and the number of the compression screws 130 and the pair of compression screws 130 can be installed in the present invention, A screw 130 may be provided, which can be variously modified according to the judgment of a person skilled in the art.

However, it is preferable that the screw hole 162 formed in the main supply barrel 160 of the present invention is formed such that a pair of compression screws 130 are installed. This is because when the main material powder- When the number of the compression screws 130 is larger than that of the screw 130, the number of the moving passages is larger and the diameter is small, and the backward flow is suppressed. In addition, mixing of the main material and the additive is smoothly performed Effect.

The vent pipe 170 is installed in the insertion hole (not shown) of the plug 150 between the supply cylinder 120 and the main supply barrel 160, And the main material in powder form is not discharged to the outside.

That is, the vent pipe 170 discharges only the gas generated in the first mixing region to supply the raw material to the extruder 20 (20) together with the raw material supplied through the supply hopper 110 and the supply cylinder 120 To be supplied to the inside of the vehicle.

The vent pipe 170 is installed through the insertion hole 152 of the plug 150 such that the end of the vent pipe 170 is located between the feeding device 100 and the extrusion molding machine 20 , The main material in the form of powder is discharged to the outside by using a mesh net 172 which discharges the gas flowed more smoothly to the outside and is connected to one end end located between the supply cylinder 120 and the extrusion molding machine 20 Do not.

That is, the mesh network 172 has a plurality of through-holes (not shown) having a size larger than the particle size of the main material in powder form, so that only the gas generated in the first mixing region is discharged. At this time, the mesh size of the mesh net 172 is in the range of 40 to 50 mesh, and a small amount of main material or additive in the form of powder can be discharged. However, by the equilibrium of the supply pressure and the back- Only a minimal amount is discharged with the gas.

In addition, the mesh net 172 is connected to the screw 130 of the supply device 100, that is, to the central position of the screw 130 installed at the inner center of the supply hopper 110 and the supply cylinder 120, If the end of one end of the mesh net 172 is not formed up to the center position of the screw 130, the gas may not be smoothly discharged to the outside, When the one end of the net 172 is formed to be positioned beyond the center position of the screw 130, the gas is smoothly discharged from the outside, and the screw blade (not shown) formed on the outer circumferential edge of the screw 130, It can not be smoothly supplied.

In other words, since the screw 130 is formed in a spiral shape on the outer circumference, the raw material is moved downward. However, since the screw 130 is formed in a spiral shape, the screw blade is formed only at half of the outer circumference at the distal end periphery, When the raw material is finally pressed downward by the screw blade and one end of the mesh net 172 is formed to be positioned beyond the center position of the screw 130, one end of the mesh net 172 is screwed It is preferable that one end of the mesh net 172 is positioned to the center position of the screw 130 because the supply of the raw material is not smoothly included in the range of the screw blade of the screw 130.

The feeder 100 of the present invention is characterized by filling the raw material in the inside of the supply hopper 110 and the supply cylinder 120 before supplying the raw material to the extruder 20 for the first time When the raw material is directly supplied to the extrusion molding machine 20 without filling the raw material therein, the supply hopper 110 and the supply cylinder 120 are filled with the raw material gas and the main raw material in powder form When the moisture is formed in the supply cylinder 120 by the water vapor in the gas flowing backward in particular, the raw material is flowed backward by the backflow pressure and the raw material is not smoothly supplied. In particular, when the moisture is accumulated in the inner cylinder of the supply cylinder 120 And failure may be caused or the supply of raw materials may not be achieved as desired.

That is, the supply apparatus 100 of the present invention is configured such that the supply pressure of the supplied raw material is the same as the back flow pressure of the main raw material in the form of powder and the gas flowing backward by filling the raw material in the supply hopper 110 and the supply cylinder 120 The gas can be smoothly discharged through the vent pipe 170 and the raw material can be smoothly supplied to the supply hopper 110 and the supply cylinder 120 The effect that the raw material is supplied and mixed more smoothly than the mixed raw material is realized by the screw 130 installed all over.

At this time, it is preferable that the supply pressure is formed to be equal to or larger than the countercurrent pressure, but it is preferable that the supply pressure and the countercurrent pressure are balanced so that the gas and the powder- Thereby allowing the gas to be smoothly discharged through the vent pipe 170.

In other words, when the supply pressure is formed to be equal to the countercurrent pressure, the backward flowing gas and powder-like main material are flowed back to the confining space formed by the plug 150, and the backwashed gas flows outside through the vent pipe 170 The backflow pressure is reduced and the supply pressure becomes larger than the backflow pressure, thereby realizing the effect that the raw material is supplied smoothly.

The supply hopper 110 is formed such that the center angle θ is in the range of 58 to 62 ° and the height h is in the range of 550 mm or more, The amount of the supplied raw material is determined according to the size and the height h of the raw material, and the size of the supply pressure is determined according to the amount of the supplied raw material. Therefore, as described above, It is preferable that it is formed in the same range as described above. This is a numerical value in consideration of the characteristic that the apparent specific gravity of the powdery main material used in the present invention is very small.

In addition, when the center angle? Of the supply hopper 110 is less than 58 degrees and the height h is less than 550 mm, the supply pressure becomes smaller than the backflow pressure, And the powder-like main material flow into the supply cylinder 120 so that the feed of the raw material is not smooth and the central angle? Is formed to exceed 62 占 and the height h is less than 550 mm, It is difficult to smoothly control the supply pressure of the raw material supplied to the lower portion only by the size of the center angle? Of the supply hopper 110, .

Further, when the center angle [theta] of the supply hopper 110 is formed to exceed 62 [deg.] And the height is formed to be too high, about 1000 mm or more, the supply pressure becomes significantly larger than the backflow pressure, The gas is not discharged through the vent pipe 170 and the main material in the form of gas and powder flows into the interior of the supply cylinder 120 by the reverse flow pressure which is increased after the occurrence of the stagnation phenomenon of the raw material in the main supply barrel 160 The supply of the raw material is not smoothly performed. Therefore, it is preferable that the center angle? Of the supply hopper 110 is within the range and the height is suitably increased according to the judgment of a person skilled in the art It will be self-evident.

The height h of the supply cylinder 120 may be greater than or equal to the central angle of the supply hopper 110 and the height h of the supply cylinder 120. [ (h) are considered together to determine the magnitude of the supply pressure, it is preferable that the supply pressure is formed in the same range as described above to form the same as the back flow pressure.

That is, the supply apparatus 100 of the present invention limits the supply pressure of the supplied raw material by limiting the size and height h of the center angle? Of the supply hopper 110 and the height h of the supply cylinder 120, And the backflow of the gas is made equal to the backflow pressure of the main material in the form of powder and powder, so that the supply pressure and the backflow pressure are made to be in equilibrium, So that the supply of the raw material can be performed smoothly.

The supply cylinder 120 has a diameter 2r that is the same as the width w of the screw hole 162 of the main supply barrel 160 so that the supply pressure and the reverse flow pressure are balanced This is because if the width w of the screw hole 162 is formed to be smaller than or larger than the diameter 2r of the supply cylinder 120, it is difficult to balance the supply pressure and the backflow pressure, It is preferable that the diameter 2r of the main supply barrel 120 and the width w of the screw hole 162 of the main supply barrel 160 have the same diameter. The width w of the screw hole 162 of the main supply barrel 160 is defined as a diameter because one compression screw 130 can be installed and a pair of compression screws 130 are installed The width w of the screw hole 162 can be expressed as a width.

The supply hopper 110 and the supply cylinder 120 are preferably determined according to the diameter 2r of the supply cylinder 120 and the supply hopper 110 and the supply cylinder 120 As described above, when the diameter (2r) of the supply cylinder is 130 mm, the central angle (?) Of the supply hopper (110) The height h of the supply cylinder 120 is preferably in the range of 463 to 469 mm and the height h of the supply cylinder 120 is preferably in the range of 560 to 560 mm, The height h of the supply cylinder 120 is set to 466 mm, and the center angle? Of the supply cylinder 110 is 61.39 degrees, the height h is 557 mm, and the height h of the supply cylinder 120 is 466 mm.

The plug 150 is installed on the inner circumferential surface of the plug 150 and includes first and second moisture sensors 180 and 190 installed at upper and lower portions of the vent pipe 170 and the mesh network 172, The motor 140 may further include a control unit (not shown) connected to the first and second moisture sensors 180 and 190 to receive the sensing information and adjust the rotational speed of the motor 140 .

More specifically, the control unit of the motor 140 receives the moisture sensing information from the first and second moisture sensors 180 and 190 and adjusts the rotational speed thereof to adjust the supply pressure of the supplied raw material. And the supply pressure is adjusted so that the supply pressure is automatically balanced with the reverse flow pressure to correspond to the reverse flow pressure that varies as the amount of gas generated in the mixed region and the movement speed vary due to external environmental factors such as temperature and humidity. To achieve the effect.

At this time, the control of the rotation speed of the motor 140 by the control unit senses the moisture in the second moisture sensor 190 installed in the lower part of the vent pipe 170, and the moisture in the first moisture sensor 180 If the second moisture sensor 190 fails to detect moisture, the supply pressure is higher than the backflow pressure, so that the gas is not discharged And when the first and second moisture sensors 180 and 190 detect moisture, the backflow pressure is high and the gas containing the water vapor and the powder into the inside of the supply cylinder 120, It recognizes that the main material of the form is introduced and increases the supply pressure by increasing the speed.

That is, the motor 140 continuously maintains the equilibrium state between the supply pressure and the reverse flow pressure through the first and second moisture sensors 180 and 190 to smoothly supply the raw material Effect.

As a result, the supply apparatus 100 of the present invention is capable of controlling the supply pressure of the raw material supplied through the supply hopper 110 and the supply cylinder 120, the gas generated in the first mixing region of the extruder 20, The backflow of the main material in the form of powder is made to be in equilibrium, and only the gas out of the main material in the powder form and the gas flowing back through the vent pipe 170 is discharged to the outside, So that the productivity can be improved.

In addition, in the case of the feeding apparatus used in the conventional pellet forming apparatus, productivity is deteriorated or production can not be performed if the paper powder contains 30% or more of paper powder due to the structure characteristics of the hopper. However, The pellets of the present invention can produce eco-friendly pellets with improved productivity and superior quality compared with conventional ones even when the paper powder is contained in an amount of 50% or more.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is possible to carry out various changes in the present invention.

10: pellet molding apparatus 20: extrusion molding machine
21: compression screw 22: main supply part
100: Feeder
110: feed hopper 112: air knocker
120: feed cylinder 130: screw
140: motor 150: plug
160: main supply barrel 170: vent pipe
172: mesh network

Claims (10)

delete 1. A feeding device (100) for feeding a raw material containing a main raw material powder and an additive to an extrusion molding machine (20) of a pellet molding machine (10)
A feed hopper 110 into which the raw material is fed from a feed pipe;
A cylindrical supply cylinder 120 coupled to a lower portion of the supply hopper 110;
A screw 130 installed at an inner center of the supply hopper 110 and the supply cylinder 120;
A motor 140 installed on the supply hopper 110 to rotate the screw 130;
A plug 150 coupled to a lower portion of the supply cylinder 120;
A main supply barrel 160 coupled to a lower portion of the plug 150 and connected to a main supply portion 22 of the extrusion molding machine 20; And
And a vent pipe (170) installed between the supply cylinder (120) and the main supply barrel (160).
3. The method of claim 2,
The vent pipe (170)
And a mesh net 172 coupled to one end of the extruder 20 located between the feed cylinder 120 and the extrusion molding machine 20. The pellet feeder .
The method of claim 3,
The mesh network 172 includes
Wherein the pellet is formed such that one end thereof is located up to a central position of the screw (130) of the feeder (100).
5. The method of claim 4,
The feeding device 100 is
Wherein the raw material is filled in the extruder (20) before the raw material is supplied to the extruder (20).
6. The method of claim 5,
The feed hopper 110
Wherein a size of the central angle (?) Is in a range of 58 to 62 占 The raw material feed device for producing pellets contains paper powder in an amount of 50% or more.
The method according to claim 6,
The feed hopper 110
And a height (h) of 550 mm or more.
8. The method of claim 7,
The main supply barrel 160
And a screw hole 162 formed in the inside of the extrusion molding machine 20 and provided with the other side of the compression screw 21,
The feed cylinder (120)
Characterized in that the diameter (2r) is formed to have the same diameter as the width (w) of the screw hole (162) of the main supply barrel (160).
9. The method of claim 8,
The feed cylinder (120)
And a height (h) of 463 mm or more.
10. The method according to any one of claims 2 to 9,
The feed hopper 110
And at least one air knocker (112) installed at the outer periphery of the paper kneader.

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